Heat-regulating apparatus.



N. B. NASH.

HEAT REGULATING APPARATUS.

A'YPLIGATIOH FILED JUNE 16, 1913.

1,124,788. Patented Jan. 12, 1915 2 SHEETS-SHEET 2.

lwmmor /m'l. AM WW "which is held in place by the screw 5 whose head overlaps the edge of the flange as NATHANE. NASH, OF TORONTO, ONTARIO, CANADA.

HEAT-BEGULATING APPARATUS.

Specification '0: Letters latent.

Patented Jan. 12, 1915.

Application filed June 16, 1913. Serial No. 774,056.

5 certain Improvements in Heat-Regulating Apparatus, of which the following is a specification. I

This invention relates to certain improvements inthat class of heat-regulating apparatus in which the opening and closing of the radiator-valve, or that valve which ad- 'mits steam to a radiator, is effected, primarily, by a thermostat which in its movement consequent upon a change in temperature of the air surrounding the thermostat controls the admission to and the discharge of air from a diaphragm adapted to either open or close the radiator-valve, as may be arranged, the reverse movement being eflected by a spring.

In the description of the said invention which follows, reference is made to the accompanying drawing, forming a part here.- of, and in which Figure 1 is a top or front view of the improved heat-regulating apparatus; and Fig. 2 a top or front sectional view. Fig. 3 is a section taken on the broken line :rw in Fig. 1; and Fig. 4 a section taken on the broken line y- 2 in Fig. 1. Fig. 5 is a partly sectional view showing the heat regulating apparatus as applied to an ordinary radiator valve. 7

Referring now to the drawing, 1 is the shell of the apparatus which to facilitate the formation of certain passages therein, is constructed preferably in three parts, a, b and c.

The parts a and b are secured together by means of screws 2 shown in Figs. 1 and 4; and the part c is fastened to the part b by means of solder, or screws not shown, as may i bedecided upon.

The shell 1 is bored from the inner face of the part b to its end, to produce the cylinder 3 in which is inserted the flanged plug 4 shown in Fig. 3.

7 is a piston in the cylinder 3, having an extension d of a smaller diameter which passes loosely through the plug 4. It is immaterial whether the piston is made solid, or recessed at its end as shown by the dotted lines in Figs. 2 and 3.

The part-b of the shell 1 is bored to a proper depth to produce the valve chamber 12 which is internally threaded to receive the flanged plug 9, and is in communication with the cylinder 3 by way of the port 9.

13 is a passage leading upward from the bottom of the part b of the shell 1 having a branch 13 which extends longitudinally of the shell to a point beyond the end of the plug 4, 'a second branch 13 leading to, and registering with an annular recess 14 in the said plug, and a third branch 13 which places it in communication directly with the cylinder 3. This annular recessis also in communication with the interior of the cyl-..

inder 3 by'means of the channels 6'. The passage 13 is in communication by means of a depression f formed in the bottom of the part c of the casing, with a vertical duct 15 which terminates in the valve chamber 12 where the material around the duct, forms a seat for the valve 16. 4 This valve is a part of a vertical stem 17 which passes loosely through an aperture 19.

The differentialv diameters of the aperture 19 and the stem 17 aresuch that there is produced around the stem an annular space 20 as shown in Figs. 3 and 4. j

The lower edge of the-material around the aperture 19 serves as a second and upper seat for the valve 16; and the valwe has suflicient vertical movement to admit of the closing of either the aperture 19 or the duct 15, one of them being at all times open. The passage 13 by means of a pipe not shown, is in communication with a source of supply of air under pressure; and when the valve 16 is seated so as to close the duct 15 the entrance of the said air from the valve chamber to the cylinder 3 by way of the port g, is prevented.

"21 is apassage which like the one 13, extends upward from the bottom of the shell 1. It has a horizontally extending branch 21 which is diametrically opposite the branch 13 and a second branch 21 in communication with the cylinder 3. There is also an intermediate branch 21 which registers with an annular groove 22 in the piston 7 when the end of that device is in contact with the part b of the shell.

When the piston is in contact with the flanged plug 4, the branch passages 21 and 13 are closed, 'and' the annular groove 22 registers with the branch passage 21 and the aperture'24 (shown only in Fig. 3) which leads to the atmosphere.

The passage 21 by means of a-pipe 21 shown only in Fig-5, is in communication with the space above the diaphragm the depression of which closes the valve which lower plate j being of steel, and the upper plate la of celluloid, horn or some other ma terial having a less degree of extension than steel when at a common temperature. 1

As a result of the construction of the thermostatic blade described, the blade if straight at a predetermined temperature, will curve inward or downward should the temperature of the surrounding air become lower, and upward if the temperature is raised; and the function of the said blade is to ultimately actuate the radiator valve, and thereby effect the closing of the said valve, or admit of its being opened by the action of the spring used in connection there with.

At the free end of the thermostatic blade 25 is a fixed bushing 30 into which is screwed an interiorly and exteriorly threaded thimble 32 having a hand-operated adjusting screw 33 the lower end of which bears on the end of the valve stem 17.

35 is a pointer secured to the thimble 32 which is used in connection with a graduated sector 37 on the thermostatic blade (see Figs. 1 and 3) for a purpose hereinafter described.

39 is a light compressed valve-balancing spring on the valve stem 17, which is confined endwise between the plug-9 and a collar 40 on the said stem.

Supposing the various parts of the apparatus to be in the positions shown in the drawing, and the apparatus adjusted by the screw 33, to retain the temperature of the room in which it is placed, at say, 70 degrees; the passage 15 being closed by the valve 16, compressed air is excluded from the piston where adjacent to the port 9, but acts on the reduced or annular area at the other end, which retains the piston in the position described. At this time, the compressed air is acting upon the diaphragm of the radiator valve by way of the passages 13, 13, 13", the annular groove 22 in the piston, the passages 21, 21, and 21, and the pipe not shown; and by overcoming the tension of the spring beneath it, keeps the said valve closed; and .thisconditlon is -maintained until the temperature in the isa-res room falls below degrees. Now supposing that this change in the temperature of the. room to have taken place, the thermostatic blade will bend upward or outward, thus removing the screw 33 from contact with the end of the valve stem 17. The compressed air will then force the valve 16 from its lower,- to its upper seat, thereby closing the annular space 20 and allowing the full .force. of compressed air to pass through the port 9 and act upon the end of the piston adjacent thereto; and in view of the smaller area of the piston at the other end thereof which is subjected to the air pressure, the piston is forced forward to contact with the plug 4: which brings the annular groove 22 in the piston into registration with the branch passage 21 and the aperture 24. The space above the diaphragm of the radiator valve, will then com: municate with the said aperture by way of the'pipe not shown, the passages '21, 21*, 21 andthe annular groove 22 in. the piston. By this operation of the apparatus, the pressure of air on the diaphragm of the radiator valve will be reduced, and the spring beneath it will cause the said. valve to open, and admit steam to the radiator. As soon as the temperature of 70 degrees in the room, is slightly exceeded, the thermostatic blade will bend inward, and the valve 16 be again forced to its lower seat, and the compressed air being cut off from the valve chamber 12, the air remaining in the said of the branch 13 the annular groove 22 in the piston to the branch passage 21 thence to the branch 21 to the passage 21 and the pipe not shown to the diaphragm of the radiator valve which will be closed and remain closed until the temperature in the room has fallen below 70, degrees when the operation described will be repeated.

To adjust the apparatus, the room in which it is situated, is brought to the desired temperature, when the thimble 32 is screwed into place, and with its pointer on the line onthe sector 37 which represents 70. The screw 33 is then turned until its point just touches the end of the valve stem 17 when the valve is on its lower seat.

To alter the temperature at which the room is to be held, the pointer carrying both the thimble and the screw is turned to the right or left, and thereby brought over the line on the sector which indicates the required temperature.

I claim as my invention 1'. In a heat regulating apparatus, a shell comprising a cylinder, avalve chamber having a discharge opening of limited size leading to the atmosphere and a port whereby it is in communication with one end of the cylinder, a valve in the chamber which controls the admission of compressed air to the chamber and thence the said port, apiston in the cylinder having an extension of a reduced diameter the end of which is open to the air thereby producinga piston having differential effective end areas, and passages whereby the annular reduced area of thepiston is constantly exposed to compressed air, the construction described having the result that when the valve in the valve chamber is opened, the piston will be forced forward, and when closed the piston will move in a rearward direction.

2. In a heat regulating apparatus, a shell comprising a cylinder, a valve chamber having a discharge opening of limited size leading to the atmosphere and a port whereby it is in communication with one end of the cylinder, a valve in the chamber which controls the admission of compressed air to the chamber and thence the said port, a'piston in the cylinder having an extension of a reduced diameter the end of which is open to the air thereby producing a piston having differential effective end areas, and pa ssages whereby the annular reduced area of the piston is constantly exposed to com- .pressed air, the construction described having the result that when the valve in the valve chamber is opened, the piston will be forced forward, and when closed the piston will move in a rearward direction, and a thermostatic blade to actuate the said valve.

8. In a heat regulating apparatus, the combination of a radiator valve and a diaphragm whereby the said valve is directly actuated in one direction, a shell comprising a cylinder, a valve chamber having a discharge opening of limited size leading to the atmosphere and a port whereby it is in communication with one end of the cylinder, a valve which controls the admissionof'compressed air to the valve chamber and thence to the said port, an annular grooved piston in the cylinder having differential eflective end areas as described, passages whereby the'annular area of the piston is constantly exposed to compressed air, passages leading from the cylinder to the diaphragm of the said radiator valve, and branched passages arranged to register with the annular groove in the piston, whereby in the reciprocation of the piston, the said diaphragm is alter-- nately exposed to compressed air, and to the atmosphere.

4. In a heat regulating apparatus the combination with a radiator valve and a diaphragm whereby the said valve is directly actuated in one direction, of a shell comprising a cylinder, a valve chamber havpressed air, passages leading from the cylinder to the diaphragm of the radiator valve,

branch passages arranged to register with the annular groove in the piston, and a thermostat whereby in the reciprocation of the piston through the medium of the thermostat, the diaphragm of the radiator valve is alternately exposed to compressed air, and to the atmosphere.

5. In a heat regulating apparatus the combination of a radiator valve and :1 diaphragm whereby the said valve is directly actuated in one direction, a shell comprising a cylinder, a valve chamber having a discharge opening of limited size leading to the atmosphere and a port whereby it is in communication with one end of the cylinder, a balanced valve in the chamber which controls the admission of compressed air to the valve chamber and thence to said port, an annularly grooved piston in the cylinder having differential effective end areas, as described, passages whereby the annular area of the piston is constantlv exposed to compressed air,passages leading from the cylinder to the diaphragm of the radiator valve, branch passages arranged to register with the annular groove in the piston. and a thermosta't wherebvinthe reciprocation of the piston through the medium'of the thermostat, the diaphragm of the radiator valve is alternately exposed to compressed air, and

Witnesses:

A. A. BARTI-TELMER, EDMUND MORRIS. 

